prune down content_dll change to just the CONTENT_EXPORTS

content/common/json_value_serializer.h

Index: content/common/json_value_serializer.h
diff --git a/content/common/json_value_serializer.h b/content/common/json_value_serializer.h
index afb18f8f4b2e265e55ac53c44691cf8d3305eabf..4b11e52e34ac30e136b46306b6000a988c9d4ab8 100644
--- a/content/common/json_value_serializer.h
+++ b/content/common/json_value_serializer.h
@@ -11,8 +11,9 @@
 #include "base/basictypes.h"
 #include "base/file_path.h"
 #include "base/values.h"
+#include "content/common/content_export.h"
 
-class JSONStringValueSerializer : public base::ValueSerializer {
+class CONTENT_EXPORT JSONStringValueSerializer : public base::ValueSerializer {
  public:
   // json_string is the string that will be source of the deserialization
   // or the destination of the serialization.  The caller of the constructor
@@ -66,7 +67,7 @@ class JSONStringValueSerializer : public base::ValueSerializer {
   DISALLOW_COPY_AND_ASSIGN(JSONStringValueSerializer);
 };
 
-class JSONFileValueSerializer : public base::ValueSerializer {
+class CONTENT_EXPORT JSONFileValueSerializer : public base::ValueSerializer {
  public:
   // json_file_patch is the path of a file that will be source of the
   // deserialization or the destination of the serialization.